<template> 
  <div>
   <div class="search">
       <input class="search-input" type="text" placeholder="输入城市名/拼音" v-model="keyword">
   </div>
       <div class="search-content" ref="search" v-show="keyword">
         <ul >
           <li 
              v-for="item of list" 
              :key="item.id" 
              class="search-item border-bottom"
              @click="handleCityClick(item.name)"
            >
              {{item.name}}
          </li>
           <li 
              class="search-item border-bottom"
              v-show="hasList"
            >
              没有找到匹配数据
          </li>
         </ul>
       </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  computed: {
    hasList () {
      return !this.list.length
    }
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  watch: {
    keyword () {
      // 节流
      if(this.timer){
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for(let i in this.cities){
          this.cities[i].forEach(value => {
            if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                result.push(value)
              }
            })
          }
          this.list = result
        }, 100)
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search, {click:true})
  },
  methods: {
    handleCityClick (city) {
      // 传递参数并调用mutation
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}

</script>
<style lang="stylus" scoped>
@import '../../../assets/styles/var.styl';

.search {
  height: 0.73rem;
  background: $bgColor;
  padding: 0 0.1rem;
}

.search-input {
  box-sizing: border-box;
  height: 0.62rem;
  line-height: 0.62rem;
  width: 100%;
  border-radius: 0.06rem;
  text-align: center;
  color: #666;
  padding: 0 0.1rem;
}

.search-content {
  z-index: 1;
  overflow: hidden;
  position: absolute;
  top: 1.58rem;
  left: 0;
  right: 0;
  bottom: 0;
  background: #eee;
}

.search-item {
  line-height: 0.62rem;
  padding-left: 0.2rem;
  background: #fff;
  color: #666;
}
</style>